Just in case you are thinking of buying Seagate Barracuda 7200.11 ST31500341AS hard drives.
I use 7 of these 1.5tb drives in my Thecus N7700 http://deancollinsblog.blogspot.com/2008/10/thecus-n7700.html
Firmware upgrades HAVE NOT FIXED ALL MY PROBLEMS, including having to ship back 4 drives to Seagate that were less than 30 days old and they shipped me back 'reconditioned units'.
If you have to get 1.5tb drives then go ahead but if you don’t have to, then stay away from Seagate for now until they really fix these problems and dont believe all the BS public relations spin that these problems have been fixed by firmware upgrades.
Also another reason to stay away from Seagate is I was surprised to learn that they ship different hardware under the same model number.
In my situation I purchased 7 drives from the same vendor (including a thecus n7700 so they knew it was going to be used for raid), and they shipped me two model sets – fine except they aren’t compatible and cause issues when used together as a raid.
At least with Western Digital (eg the rest of my drives) they announce new models when they change hardware.
Eg. I could be really screwed if in 6 months I wanted to add another drive – as it seems its pot luck what you actually end up with.
There are currently 3 different hardware revisions in the 1.5tb model range !!! this is ludicrous.
Anyway you've been warned Seagate sucks and dont buy their Seagate Barracuda 7200.11 ST31500341AS drives.